English Premier League clubs spent £485 million in the summer transfer window.
Deloitte says spending by the top 20 English clubs was up £120 million, 33%, on last summer's outlay.
Deadline-day signings included Mikel Arteta joining Arsenal, from Everton, and Raul Meireles leaving Liverpool for Chelsea - both for more than £10 million.
Arsenal, Chelsea, Liverpool, Manchester City and Manchester United each topped £50 million in transfer spending this summer.
